221412504364403 has 16 divisors (see below), whose sum is σ = 243062410372992. Its totient is φ = 200016584064000.

The previous prime is 221412504364393. The next prime is 221412504364427. The reversal of 221412504364403 is 304463405214122.

It is a de Polignac number, because none of the positive numbers 2^k-221412504364403 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (221412504364433) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 922163 + ... + 21063603.

It is an arithmetic number, because the mean of its divisors is an integer number (15191400648312).

Almost surely, 2^{221412504364403} is an apocalyptic number.

221412504364403 is a deficient number, since it is larger than the sum of its proper divisors (21649906008589).

221412504364403 is a wasteful number, since it uses less digits than its factorization.

221412504364403 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20147746.

The product of its (nonzero) digits is 552960, while the sum is 41.

Adding to 221412504364403 its reverse (304463405214122), we get a palindrome (525875909578525).

The spelling of 221412504364403 in words is "two hundred twenty-one trillion, four hundred twelve billion, five hundred four million, three hundred sixty-four thousand, four hundred three".